CN110226303A - For resource element to be mapped to the technology based on matrix of port for reference signal - Google Patents

Abstract

Describe the technology for wireless communication.A kind of method of the wireless communication of first wireless devices includes: identification to the Template Map of a frequency sub-carrier and more than first a periods more than multiple ports to first in template running time-frequency resource grid；It is based at least partially on Template Map, multiple resource elements in orthogonal frequency division multiplexing (OFDM) running time-frequency resource grid are mapped to multiple ports；It is based at least partially on mapping, receives reference signal from the second wireless device in the subset of multiple ports；And it is based at least partially on mapping, decode the reference signal of the subset from multiple resource elements.In some cases, each port in multiple ports is associated with corresponding radio frequency (RF) chain.

Description

Matrix-based technique for mapping resource elements to ports for reference signals

cross reference

This patent application claims U.S. Patent Application No. 15/826,612, "Matrix-BasedTechniques For Mapping Resource Elements To Ports For Reference Signals," filed by Cezanne et al. on Nov. 29, 2017, and Cezanne et al., 2017 Priority to U.S. Provisional Patent Application No. 62/452,961, filed January 31, entitled "Matrixed-Based Techniques For Mapping Resource Elements To Ports For Reference Signals," each of which is assigned to the assignee of the present application people.

technical field

For example, the present disclosure relates to wireless communication systems, and in particular, to matrix-based techniques for mapping resource elements to ports for reference signals.

Background technique

Packet data, messaging, broadcast, etc. These systems may be multiple-access systems capable of supporting communications with multiple users by sharing available system resources (eg, time, frequency, and power). Examples of such multiple-access systems include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, and orthogonal frequency division multiple access (OFDMA) systems.

A wireless multiple-access communication system may include multiple network access devices, each network access device simultaneously supporting communications for multiple communication devices (otherwise referred to as user equipment (UE)). In a Long Term Evolution (LTE) or LTE-Advanced (LTE-A) wireless communication system, a network access device may take the form of a base station, where a set of one or more base stations defines an eNodeB (eNB). In next-generation, new radio (NR), millimeter wave (mmW) or 5G wireless communication systems, network access devices can employ smart radio heads (or radio heads (RH)) or access node controllers (ANC) , where a collection of intelligent radio heads communicates with an ANC that defines a gNodeB (gNB). The network access device may communicate with the set of UEs on downlink channels (eg, for transmission from the network access device to the UE) and uplink channels (eg, for transmission from the UE to the network access device) .

In some cases, the network access device may transmit reference signals. The reference signal may be broadcast to all UEs. Additionally or alternatively, the reference signal may be sent to one UE or a subset of UEs. Importantly, the reference signal is sent using a predetermined mapping of resource elements to ports (eg, radio frequency (RF) chains). The predetermined mapping of resource elements may be distributed both in time and frequency.

SUMMARY OF THE INVENTION

In one example, a method of wireless communication at a first wireless device is described. The method may include: identifying template mappings for the plurality of ports to the first plurality of frequency subcarriers and the first plurality of time periods in the template time-frequency resource grid; Mapping to the plurality of ports with the plurality of resource elements in the (OFDM) time-frequency resource grid; receiving a reference signal from the second wireless device on a subset of the plurality of ports based on the mapping; and decoding the signal from the second wireless device based at least in part on the mapping Reference signals for a subset of multiple resource elements. In some cases, each of the plurality of ports is associated with a respective radio frequency (RF) chain.

In one example, an apparatus for wireless communication at a first wireless device is described. The apparatus may include means for identifying template mappings of the plurality of ports to the first plurality of frequency subcarriers and the first plurality of time periods in the template time-frequency resource grid; for, based at least in part on the template mapping, to map means for mapping a plurality of resource elements in the OFDM time-frequency resource grid to a plurality of ports; means for receiving a reference signal from a second wireless device on a subset of the plurality of ports based at least in part on the mapping; and for A unit of decoding reference signals from a subset of the plurality of resource elements based at least in part on the mapping. In some cases, each of the plurality of ports is associated with a corresponding RF chain.

In one example, another apparatus for wireless communication at a first wireless device is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions, when executed by the processor, are operable to cause the apparatus to: identify a template mapping of the plurality of ports to the first plurality of frequency subcarriers and the first plurality of time periods in the grid of template time-frequency resources; at least in part mapping the plurality of resource elements in the OFDM time-frequency resource grid to the plurality of ports based on the template mapping; receiving reference signals from the second wireless device on a subset of the plurality of ports based at least in part on the mapping; and at least in part Based on the mapping, reference signals from a subset of the plurality of resource elements are decoded. In some cases, each of the plurality of ports is associated with a corresponding RF chain.

In one example, a non-transitory computer-readable medium storing computer-executable code for wireless communication at a first wireless device is described. The code may be executable to: identify template mappings of the plurality of ports to the first plurality of frequency subcarriers and the first plurality of time periods in the template time-frequency resource grid; based at least in part on the template mapping, map The plurality of resource elements in the OFDM time-frequency resource grid are mapped to the plurality of ports; the reference signals are received from the second wireless device on a subset of the plurality of ports based at least in part on the mapping; and based at least in part on the mapping, decoding from the Reference signals for a subset of multiple resource elements. In some cases, each of the plurality of ports is associated with a corresponding RF chain.

Some examples of the above-described methods, apparatus, and non-transitory computer-readable media may also include processes, features, means, instructions, or code for: based at least in part on the mapping, from the plurality of ports on the plurality of subsets of the plurality of ports. The second wireless device receives a plurality of reference signals including the reference signal. In some examples, multiple reference signals may be received using receive beam scanning in time and frequency.

In some examples of the above-described method, apparatus, and non-transitory computer-readable medium, a subset of the plurality of resource elements may be distributed in time and frequency on an OFDM time-frequency resource grid.

In some examples of the above-described methods, apparatus, and non-transitory computer-readable media, the mapping can include mapping each resource element of the plurality of resource elements to a single port of the plurality of ports based at least in part on template mapping. In some examples, the mapping can include mapping each of the plurality of resource elements to a port group of the plurality of ports based at least in part on an orthogonal cover code (OCC) associated with the template mapping. In some examples, the number of ports in the port group may be based at least in part on the length of the OCC.

Some examples of the above-described methods, apparatus, and non-transitory computer-readable media may also include procedures, features, means, instructions, or code for applying OCC to at least one resource element group of the plurality of resource elements. Applying OCC to a resource element group may map each resource element in the resource element group to a port group, which is associated with the resource element group by mapping multiple resource elements to multiple ports.

In some examples of the above-described methods, apparatus, and non-transitory computer-readable media, the OFDM time-frequency resource grid may include at least one of: a second greater in number than the first plurality of frequency subcarriers frequency subcarriers, a second plurality of time periods greater in number than the first plurality of time periods, or a combination thereof.

In one example, another method of wireless communication at a first wireless device is described. The method may include: identifying template mappings of the plurality of ports to the first plurality of frequency subcarriers and the first plurality of time periods in the template time-frequency resource grid; and, based at least in part on the template mapping, mapping the OFDM time-frequency resource network mapping a plurality of resource elements in the grid to a plurality of ports; mapping reference signals to a subset of the plurality of resource elements based at least in part on the mapping of the plurality of resource elements to the plurality of ports; and based at least in part on the plurality of resource elements The mapping of resource elements to the plurality of ports and the mapping of reference signals to the subset of the plurality of resource elements transmit the mapped reference signals from the subset of the plurality of ports to at least the second wireless device. In some cases, each of the plurality of ports may be associated with a corresponding RF chain.

In one example, another apparatus for wireless communication at a first wireless device is described. The apparatus may include: means for identifying template mappings of the plurality of ports to the first plurality of frequency subcarriers and the first plurality of time periods in the template time-frequency resource grid; for mapping based at least in part on the template, a unit for mapping a plurality of resource elements in the OFDM time-frequency resource grid to a plurality of ports; for mapping reference signals to sub-subs of the plurality of resource elements based at least in part on the mapping of the plurality of resource elements to the plurality of ports and means for converting the mapped reference signal from the subset of the plurality of ports based at least in part on the mapping of the plurality of resource elements to the plurality of ports and the mapping of the reference signal to the subset of the plurality of resource elements A unit sent to at least a second wireless device. In some cases, each of the plurality of ports may be associated with a corresponding RF chain.

In one example, another apparatus for wireless communication at a first wireless device is described. The apparatus may include a processor, memory in electronic communication with the processor, and instructions stored in the memory. The instructions, when executed by the processor, are operable to cause the apparatus to: identify a template mapping of the plurality of ports to the first plurality of frequency subcarriers and the first plurality of time periods in the template time-frequency resource grid; Mapping the plurality of resource elements in the OFDM time-frequency resource grid to the plurality of ports based at least in part on the template mapping; and mapping the reference signal to the plurality of resources based at least in part on the mapping of the plurality of resource elements to the plurality of ports a subset of elements; and based at least in part on the mapping of the plurality of resource elements to the plurality of ports and the mapping of the reference signals to the subset of the plurality of resource elements, transmitting the mapped reference signals from the subset of the plurality of ports to at least a second wireless device. In some cases, each of the plurality of ports may be associated with a corresponding RF chain.

In one example, another non-transitory computer-readable medium storing computer-executable code for wireless communication at a first wireless device is described. The code may be executable to identify template mappings of a plurality of ports to a first plurality of frequency subcarriers and a first plurality of time periods in a grid of template time-frequency resources; based at least in part on the template mapping, mapping the OFDM time-frequency resources mapping a plurality of resource elements in the mesh to a plurality of ports; mapping reference signals to a subset of the plurality of resource elements based at least in part on the mapping of the plurality of resource elements to the plurality of ports; and based at least in part on a to-many A mapping of resource elements to a plurality of ports and a mapping of reference signals to a subset of the plurality of resource elements sends the mapped reference signals from the subset of the plurality of ports to at least a second wireless device. In some cases, each of the plurality of ports may be associated with a corresponding RF chain.

Some examples of the above-described methods, apparatus, and non-transitory computer-readable media may also include procedures, features, means, instructions, or code for: based at least in part on the mapping of the plurality of resource elements to the plurality of ports, A plurality of reference signals including the reference signals are mapped to a plurality of subsets of a plurality of resource elements. In some examples, some examples of the method, apparatus, and non-transitory computer-readable medium may also include processes, features, means, instructions, or code for: The mapping of the plurality of ports and the mapping of the reference signals to the subsets of the plurality of resource elements sends the mapped plurality of reference signals from the plurality of subsets of the plurality of ports to the at least second wireless device. In some examples, the mapped multiple reference signals may be transmitted using transmit beam scanning in time and frequency.

In some examples of the above-described method, apparatus, and non-transitory computer-readable medium, a subset of the plurality of resource elements may be distributed in time and frequency on an OFDM time-frequency resource grid.

In some examples of the above-described methods, apparatus, and non-transitory computer-readable media, the mapping of the plurality of resource elements to the plurality of ports may include: mapping each resource element of the plurality of resource elements based at least in part on the template mapping Maps to a single port out of multiple ports. In some examples, the mapping of the plurality of resource elements to the plurality of ports may include mapping each of the plurality of resource elements to a port of the plurality of ports based at least in part on an OCC associated with the template mapping Group. In some examples, the number of ports in the port group may be based at least in part on the length of the OCC.

Some examples of the above-described methods, apparatus, and non-transitory computer-readable media may also include procedures, features, means, instructions, or code for applying OCC to at least one resource element group of the plurality of resource elements. Applying OCC to a resource element group may map each resource element in the resource element group to a port group, which is associated with the resource element group by mapping multiple resource elements to multiple ports.

In some examples of the above-described methods, apparatus, and non-transitory computer-readable media, the OFDM time-frequency resource grid may include at least one of: a second greater in number than the first plurality of frequency subcarriers frequency subcarriers, a second plurality of time periods greater in number than the first plurality of time periods, or a combination thereof.

The foregoing has outlined rather broadly the techniques and technical advantages of examples in accordance with the present disclosure in order that the detailed description that follows may be better understood. Additional techniques and advantages are described below. The conception and specific example disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent structures do not depart from the scope of the appended claims. The features of the concepts disclosed herein, their organization and methods of operation, and related advantages will be better understood from the following description when considered in conjunction with the accompanying drawings. Each drawing is provided for purposes of illustration and description, and not as a definition of the limitations of the claims.

Description of drawings

A further understanding of the nature and advantages of the present disclosure may be realized by reference to the following drawings. In the drawings, similar components or functions may have the same reference numerals. In addition, various components of the same type may be distinguished by following the reference number with a dash and a second label that distinguishes similar components. If only the first reference number is used in the description, the description applies to any one similar component with the same first reference number, irrespective of the second reference number.

1 illustrates an example of a wireless communication system in accordance with various aspects of the present disclosure;

2 illustrates an example of a wireless communication system including a network access device and a UE in accordance with various aspects of the present disclosure;

3 illustrates a template matrix that may be used to map resource elements to ports in accordance with various aspects of the present disclosure;

4 illustrates a mapping of resource elements to ports in accordance with various aspects of the present disclosure;

5 illustrates OCC-based mapping of resource elements to ports in accordance with various aspects of the present disclosure;

6 illustrates a block diagram of an apparatus for wireless communication in accordance with various aspects of the present disclosure;

7 illustrates a block diagram of an apparatus for wireless communication in accordance with various aspects of the present disclosure;

8 illustrates a block diagram of a wireless communication manager in accordance with various aspects of the present disclosure;

9 illustrates a block diagram of an apparatus for wireless communication in accordance with various aspects of the present disclosure;

10 illustrates a block diagram of a wireless communication manager in accordance with various aspects of the present disclosure;

11 illustrates a block diagram of a UE for wireless communication in accordance with various aspects of the present disclosure;

12 illustrates a block diagram of a network access device for wireless communications in accordance with various aspects of the present disclosure; and

13-18 are flowcharts illustrating examples of methods for wireless communication at a wireless device (eg, a first wireless device) in accordance with various aspects of the present disclosure.

Detailed ways

Part of next-generation, NR or 5G wireless communication systems will be based on mmWave communications. mmWave communications are expected to provide very high data rates with ultra-low latency. It is expected that beamforming will be used to overcome the poor link margin typically associated with mmW communications. Beamforming, especially the scanning of beams by both the network access device and the UE, may use reference signals allocated in time and frequency. Pre-5G wireless communication systems have provided transmission of reference signals for beam scanning based on time-based or frequency-based mapping of resource elements to ports. More specifically, prior to NR, each antenna port has been allocated to a resource block. However, with the advent of mmWave communications, a large number of antennas and a smaller number of RF chains are available for communications. As a result, RF chains can be mapped to antenna ports to communicate efficiently using mmWave communications. This disclosure describes matrix-based techniques for mapping resource elements to ports for reference signals. Depending on the implementation, matrix-based techniques can minimize the overhead required to map resource elements to ports, facilitate simultaneous scanning (by the network access equipment) of the transmit beam and receive beams (by the UE), and Provides independent mapping periods in time and frequency.

The following description provides examples, and does not limit the scope, applicability, or examples set forth in the claims. Changes may be made in the function and arrangement of elements discussed without departing from the scope of the disclosure. Various examples may omit, substitute or add various procedures or components as appropriate. For example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Also, features described with respect to some examples may be combined in some other examples.

1 illustrates an example of a wireless communication system 100 in accordance with various aspects of the present disclosure. Wireless communication system 100 may include network access equipment 105 (eg, gNB 105-a, ANC 105-b, and/or RH 105-c), UE 115, and core network 130. Core network 130 may provide user authentication, access authorization, tracking, IP connectivity, and other access, routing, or mobility functions. At least some network access devices 105 (eg, gNB 105-a or ANC 105-b) may be connected to core network 130 through backhaul links 132 (eg, S1, S2, etc.) and may perform functions for communicating with UEs 115. Radio configuration and scheduling. In various examples, ANCs 105-b may communicate with each other directly or indirectly (eg, through core network 130) via backhaul links 134 (eg, X1, X2, etc.), which may be wired or wireless communications link. Each ANC 105-b may additionally or alternatively communicate with multiple UEs 115 through multiple intelligent radio heads (eg, RH 105-c). In alternative configurations of the wireless communication system 100, the functionality of the ANC 105-b may be provided by the radio head 105-c or distributed over the radio head 105-c of the gNB 105-a. In another alternative configuration of the wireless communication system 100 (eg, an LTE/LTE-A configuration), the radio head 105-c may be replaced by a base station, and the ANC 105-b may be replaced by a base station controller (or linked to the core network) 130). In some examples, wireless communication system 100 may include a mix of radio heads 105-c, base stations, and/or other network access devices 105 for use in accordance with different radio access technologies (RATs) (eg, LTE/LTE- A, 5G, Wi-Fi, etc.) to receive/send communications.

A macro cell may cover a relatively large geographic area (eg, several kilometers in radius) and may allow unrestricted access by UEs 115 with a service subscription with a network provider. Compared to macro cells, small cells may include lower power radio heads or base stations, and may operate in the same or different frequency bands as macro cells. According to various examples, small cells may include pico cells, femto cells, and micro cells. For example, a pico cell may cover a small geographic area and may allow unrestricted access by UEs 115 with a service subscription with a network provider. A femtocell may also cover a smaller geographic area (eg, a home) and may provide UEs 115 associated with the femtocell (eg, UEs in a Closed Subscriber Group (CSG), UEs for users in a home) etc.) restricted access. A gNB for a macro cell may be referred to as a macro gNB. A gNB for a small cell may be referred to as a small cell gNB, pico gNB, femto gNB or home gNB. A gNB may support one or more (eg, two, three, four, etc.) cells (eg, component carriers).

The wireless communication system 100 may support synchronous operation or asynchronous operation. For synchronous operation, gNBs 105-a and/or radio heads 105-c may have similar frame timing, and transmissions from different gNBs 105-a and/or radio heads 105-c may be approximately aligned in time. For asynchronous operation, gNBs 105-a and/or radio heads 105-c may have different frame timing, and transmissions from different gNBs 105-a and/or radio heads 105-c may not be aligned in time. The techniques described herein can be used for synchronous or asynchronous operations.

A communication network that may accommodate some of the various disclosed examples may be a packet-based network operating according to a layered protocol stack. In the user plane, communications at the bearer or Packet Data Convergence Protocol (PDCP) layer may be IP based. The RLC layer may perform packet segmentation and reassembly in some cases to communicate on logical channels. The Medium Access Control (MAC) layer may perform prioritization and multiplexing of logical channels to transport channels. The MAC layer may also use Hybrid ARQ (HARQ) to provide retransmissions at the MAC layer to improve link efficiency. In the control plane, the Radio Resource Control (RRC) protocol layer may provide for the establishment, configuration and maintenance. At the physical (PHY) layer, transport channels can be mapped to physical channels.

UEs 115 may be dispersed throughout wireless communication system 100, and each UE 115 may be stationary or mobile. UE 115 may also include or be referred to by those skilled in the art as a mobile station, subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access Terminal, mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client or some other suitable term. UE 115 may be a cellular telephone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, tablet computer, laptop computer, cordless telephone, wireless local loop (WLL) station, Internet of Everything (IoE) device Wait. The UE 115 is capable of communicating with various types of gNBs 105-a, radio heads 105-c, base stations, access points or other network access devices (including macro gNBs, small cell gNBs, relay base stations, etc.). UEs 115 are also capable of communicating directly with other UEs 115 (eg, using a peer-to-peer (P2P) protocol).

The communication link 125 shown in the wireless communication system 100 may include an uplink (UL) from the UE 115 to the radio head 105-c, and/or a downlink (UL) from the radio head 105-c to the UE 115 ( DL). The downlink may also be referred to as the forward link, and the uplink may also be referred to as the reverse link. Control information and data may be multiplexed on the uplink or downlink according to various techniques. Control information and data may be multiplexed on the uplink or downlink, eg, using time division multiplexing (TDM) techniques, frequency division multiplexing (FDM) techniques, or hybrid TDM-FDM techniques.

Each communication link 125 may include one or more carriers, where each carrier may be a signal composed of multiple sub-carriers (eg, waveform signals of different frequencies) modulated according to one or more radio access technologies. Each modulated signal may be sent on a different subcarrier and may carry control information (eg, reference signals, control channels, etc.), overhead information, user data, and the like. Communication link 125 may transmit bidirectional communications using frequency division duplexing (FDD) techniques (eg, using paired spectral resources) or time division duplexing techniques (eg, using unpaired spectral resources). A frame structure (eg, frame structure type 1) may be defined for frequency division duplexing (FDD) and a frame structure (eg, frame structure type 2) for time division duplexing (TDD).

In some examples of wireless communication system 100, network access device 105 (eg, radio head 105-c) and UE 115 may include multiple antennas for using antenna diversity schemes to improve network access device 105 and UE 115 quality and reliability of communication between them. Additionally or alternatively, the network access device and UE 115 may employ multiple-input multiple-output (MIMO) techniques, which may utilize a multi-path environment to transmit multiple spatial layers carrying the same or differently coded data. In some cases, signal processing techniques such as beamforming (ie, directional transmission) may be used with MIMO techniques to coherently combine signal energy and overcome path loss in a particular beam direction. Precoding (eg, weighted transmission on different paths or layers or from different antennas) can be used in conjunction with MIMO or beamforming techniques.

Wireless communication system 100 may support operation on multiple cells or carriers, a feature that may be referred to as carrier aggregation (CA) or multi-carrier operation. A carrier may also be referred to as a component carrier (CC), layer, channel, or the like. The terms "carrier", "component carrier", "cell" and "channel" are used interchangeably herein. UE 115 may be configured with multiple downlink CCs and one or more uplink CCs for carrier aggregation. Carrier aggregation can be used with FDD and TDD component carriers.

In some examples, UE 115 may include wireless communication manager 140 or network access device 105 may include wireless communication manager 150 . In some examples, wireless communication manager 140 or 150 may be configured to identify template mappings of the plurality of ports to the first plurality of frequency subcarriers and the first plurality of time periods in the template time-frequency resource grid; at least in part mapping the plurality of resource elements in the OFDM time-frequency resource grid to the plurality of ports based on the template mapping; receiving reference signals from the second wireless device on a subset of the plurality of ports based at least in part on the mapping; and based at least in part on Map, decode, reference signals from a subset of multiple resource elements, as described, for example, with reference to Figures 3-8 and 13-15. In some examples, wireless communication manager 140 or 150 may additionally or alternatively be configured to identify template mappings of the plurality of ports to the first plurality of frequency subcarriers and the first plurality of time periods in the template time-frequency resource grid ; Mapping multiple resource elements in the OFDM time-frequency resource grid to multiple ports based at least in part on template mapping; mapping reference signals to multiple ports based at least in part on the mapping of multiple resource elements to multiple ports a subset of resource elements; and based at least in part on the mapping of the plurality of resource elements to the plurality of ports and the mapping of the reference signals to the subset of the plurality of resource elements, transferring the mapped reference signals from the subset of the plurality of ports sent to at least a second wireless device.

2 illustrates an example of a transmission diagram 200 including a network access device 205 and a UE 215 in accordance with various aspects of the present disclosure. Network access device 205 and UE 215 may be examples of aspects of the network access device and UE described with reference to FIG. 1 . In transmission diagram 200 , network access device 205 includes multiple antenna ports 210 , where each antenna port 210 is associated with a single RF transmit chain 230 . Each antenna port 210 may be coupled with multiple physical antennas 211 . Physical antennas may be arranged in antenna panels 225 , where each antenna panel 225 may include a plurality of physical antennas 211 . Each antenna panel 225 can implement one or more antenna configurations. Each antenna configuration can be referred to as a beam. Each antenna panel 225 may be single-polarized or dual-polarized. In some examples, the network access device may include M antenna panels 225 (eg, antenna panels 225-a, 225-b, . . . , 225-m), where each antenna panel 225 includes N physical antennas 211. The distance between the physical antennas 211 of the antenna panel 225 may be less than λ/2, where λ describes the shortest operating wavelength of the transmitter. Each antenna panel 225 may be configured to have its own capability to perform phase shifting (eg, phase shifter 221 ) for the antennas in that antenna panel to generate from one of the antenna ports 210 with selectable the beam direction and/or beam width of the beam. Each RF transmit chain 230 may include digital processing capabilities for RF signals, and may generate analog RF output signals (eg, via a digital-to-analog converter (DAC)) for transmission via one or more antenna panels 225 . In some cases, different antenna panels 225 associated with the common antenna port 210 may transmit at different frequencies and in different directions. As an example, the output of physical antenna 211 may form transmit beam 260 . When transmitting, network access device 205 may map transmissions (eg, control channels, data channels, or reference signals) to multiple resource elements distributed in time and/or frequency, and from multiple ports mapped to resource elements 210 Send transmission.

UE 215 may include multiple physical antennas 212 and multiple antenna ports 220 . Physical antennas 212 may be grouped, with signals from each group combined in antenna beam receive component 222. For example, each antenna beam receiving component 222 may be an analog combiner that combines signals from multiple physical antennas 212 in the analog domain. The combined signal may be processed by RF chain 235 for reception via antenna port 220 . Thus, each antenna port 220 may be associated with one RF chain 235 and capable of receiving composite beams transmitted from one or more antenna panels 225 of the network access device 205 . Although two antenna ports 220 are shown, the UE may have only one or more than two antenna ports 220 . Upon reception, the UE 215 may receive transmissions (eg, control channels, data channels, or reference signals) mapped to multiple resource elements distributed in time and/or frequency on the composite beam via the antenna ports, and decode transmissions from multiple The received symbol for the transmission of the resource element. In some examples, the resource element to port mapping may be based on a template matrix (or template mapping), as described with reference to FIGS. 3 and 4 .

3 illustrates a template matrix 300 that may be used to map resource elements to ports in accordance with various aspects of the present disclosure. The template matrix P provides pairs of ports (eg, 16 ports numbered 200, 201, ..., 214, 215) to M subcarriers (eg, 4 subcarriers) and N time periods ( For example, 4 OFDM symbol periods) template mapping. In the example of Figure 3, the template matrix P is a 2-dimensional 4x4 matrix. A first dimension (eg, shown horizontally in FIG. 3 ) may indicate a time period for mapping multiple ports, and a second dimension (eg, shown vertically in FIG. 3 ) may indicate frequency resources for mapping ports . In some cases, the template matrix P may be associated with multiple RF chains scanning through different symbols. In this example, the template matrix P is associated with 4 RF chains scanned through 4 different symbols. In some examples, each column of template matrix P may be associated with a respective UE (such as UE 115). For example, ports 200, 208, 204 and 212 may be used to scan 4 different beams associated with a particular UE. Similarly, ports 201, 209, 205 and 213 may be used to scan different beams for the second UE, ports 202, 210, 206 and 214 may be used to scan different beams for the third UE, and ports 203, 211, 207 and 215 Can be used to scan a different beam for the fourth UE. In some examples, a base station (eg, network access device 105) may be configured to allocate resources to 4 different beams directed to 4 different UEs over 4 different time periods. In some examples, the base station (eg, network access device 105) may allocate additional frequency resources to repeat the template matrix P in the frequency dimension, and the additional repetitions of the template matrix may be associated with different antenna panels. The base station may allocate additional time resources to repeat the template matrix P in the time dimension to change the beam direction associated with each antenna port for a given panel. The repetition of the template matrix P is described in more detail with reference to FIG. 4 . It should be understood that the template matrix P can be mapped to contiguous or non-contiguous resources within the set of time-frequency resources. For example, every other, every third, or every fourth subcarrier may be used to transmit the reference signal via the antenna port, and the template matrix P may be mapped to the reference signal resource elements.

4 illustrates a mapping 400 of resource elements to ports in accordance with various aspects of the present disclosure. Each resource element 405 is defined by the intersection of a frequency subcarrier 455 in the OFDM time-frequency resource grid 410 and a time period 445 (eg, an OFDM symbol period). As an example, the OFDM time-frequency resource grid 410 shown in FIG. 4 includes (or spans) F subcarriers 455 (eg, 12 subcarriers) and T time periods 445 (eg, 8 OFDM symbol periods). Thus, the OFDM time-frequency resource grid 410 includes 96 resource elements 405 .

Resource map 400 shows 16 pairs of ports (eg, numbered 200, 201, . port) to element 405 mapping. In some cases, the template matrix P may be repeated over time and frequency resources. Based on the M×N template matrix P, the resource element (k,l) can be mapped to the port number port(k,l) of the template matrix P based on the following rules:

port(k,l)=P(k mod M,l mod N),

where k is the kth subcarrier frequency of the OFDM time-frequency resource grid 410, l is the lth time period of the OFDM time-frequency resource grid 410, 0≤k≤F-1, and 0≤1≤T-1.

Within each resource element 405 the number of ports mapped to each resource element 405 is recorded. In some examples, the transmitting and receiving devices may be configured with multiple template matrices, and the template matrix may be selected for use based on various parameters.

In some examples, one or more reference signals may be mapped to resource elements 405 based at least in part on mapping 400 . In one example, the first row 420 of resource element 405 shown in FIG. 4 can be mapped to ports 200-203, the second row 425 of resource element 405 can be mapped to ports 208-211, the resource element 405 can be mapped to ports 208-211 The third row 430 of the resource element 405 maps to ports 204-207, and the fourth row 435 of the resource element 405 may map to ports 212-215. In some cases, different instances of the template matrix P may be associated with different beam directions for the antenna ports. For example, the template matrix P for the first set of subcarriers 450-a and the first set of time periods 440-a may be associated with a first beam direction for the first antenna panel. Additional instances of the template matrix P may be associated with different beam directions for the first antenna panel or with different antenna panels. For example, for the additional set of time periods 440, the template matrix P can be mapped to the same antenna panel using different beam directions. Thus, instances of the template matrix P for the first set of subcarriers 450-a and the second set of time periods 440-b may also be sent via the first antenna panel, but with different beam directions. An instance of the template matrix P for the second set of subcarriers 450-b and the first set of time periods 440-a may be sent via the second antenna panel. An instance of the template matrix P for the third set of subcarriers 450-c and the first set of time periods 440-a may be sent via the third antenna panel. In some examples, different ports may be assigned to different polarizations (eg, orthogonal polarizations).

In some examples, each antenna port may be associated with a corresponding RF chain at the transmitter. In some examples, each antenna port may also be associated with a corresponding RF chain at the receiver. Thus, a receiver may receive through a given antenna port (eg, antenna port 200) in a given symbol period via one RF chain that may be coupled (eg, through an analog combiner) to one or more physical antennas Synthesized beam. For example, a receiver may have four receive antenna ports for receiving transmissions via antenna ports 200, 208, 204, and 212, respectively. In some examples, the receiver may not be able to distinguish directions within the composite beam (eg, due to analog combining for a given antenna port). The transmitter may transmit the template matrix P over a set of five time periods 440, each port being a composite of three beams (via three antenna panels). Thus, the transmitter may transmit a total of 15 beams via the set of five time periods 440 via each antenna port. The receiver can detect the energy of each composite beam and report the composite beam with the highest detected energy. The transmitter can then perform finer beam refinement to select one or more beams from the identified synthesized beams for transmission to the receiver.

In mapping 400, each resource element is mapped to a single port. Sometimes it may be useful to map resource elements to a linear combination of L ports, where L>1. In some examples, an orthogonal cover code (OCC) of length L bits may be used to map the resource elements to the L ports, as shown in FIG. 5 .

5 illustrates an OCC-based mapping 500 of resource elements to ports in accordance with various aspects of the present disclosure. Each resource element 505 is defined by the intersection of frequency subcarriers and time periods (eg, OFDM symbol periods) in the OFDM time-frequency resource grid 510 . As an example, the OFDM time-frequency resource grid 510 shown in FIG. 5 includes (or spans) a plurality of F frequency subcarriers and a plurality of T time periods.

Each resource element 505 in the OFDM time-frequency resource grid 510 may be mapped to a port group of the plurality of ports based on an OCC having a length of L bits. In some examples, the OFDM time-frequency resource grid 510 may be partitioned into multiple unconnected (non-overlapping) resource element blocks 515 having dimensions of F _OCC frequency subcarriers and _TOC time periods, where F _OCC and Each of T _OCC is equal to or greater than one, wherein at least one of F _OCC and T _OCC is greater than one, and wherein each resource element block 515 includes L resource elements 505 (ie, the area of each resource element block R _OCC =F _OCC x T _OCC =L). Each resource element 505 within the resource element block 515 may be mapped by OCC to each of the L ports (ie, to all ports in the set of ports P={p ₀ , . . . , p _L-1 }).

In some examples, the OCC may be associated with a template mapping of ports to frequency subcarriers and time periods (eg, the template matrix P described with reference to FIG. 3 ). In other examples, OCC may be applied to groups of resource elements independently of template mapping of ports to frequency subcarriers and time periods. That is, one or two of the dimensions of the resource block group may be different from one or more of the corresponding dimensions of the template matrix P, such that F _OCC ×T _OCC ≠M×N. In some examples, different OCCs may apply to different resource element groups.

6 illustrates a block diagram 600 of an apparatus 605 for wireless communication in accordance with various aspects of the present disclosure. Apparatus 605 may be an example of aspects of the UE or network access device described with reference to FIGS. 1 and 2 . Apparatus 605 may include receiver 610 , wireless communication manager 615 and transmitter 620 . Apparatus 605 may also include a processor. Each of these components can communicate with each other (eg, via one or more buses).

Receiver 610 may receive data or control signals or information (ie, transmissions), some or all of which may be associated with various information channels (eg, data channels, control channels, etc.). Received signals or information, or measurements performed thereon, may be communicated to other components of apparatus 605 . Receiver 610 may include a single antenna or a group of antennas.

Wireless communication manager 615 and/or at least some of its various subcomponents may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions of wireless communication manager 615 and/or at least some of its various subcomponents may be implemented by a general-purpose processor, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or any combination thereof.

Wireless communication manager 615 and/or at least some of its various subcomponents may be physically located at various locations, including distributed such that portions of functionality are implemented by one or more physical devices at different physical locations. In some examples, wireless communication manager 615 and/or at least some of its various subcomponents may be separate and distinct components in accordance with various aspects of the present disclosure. In other examples, wireless communication manager 615 and/or at least some of its various subcomponents may be combined with one or more other hardware components, including but not limited to I/O, in accordance with various aspects of the present disclosure A component, a transceiver, another computing device, one or more other components described in this disclosure, or any combination thereof. The wireless communication manager 615 may be an example of aspects of the wireless communication manager described with reference to FIG. 1 .

The wireless communication manager 615 can be used to manage one or more aspects of wireless communication to the device 605 and can be used to: identify a first plurality of frequency sub-frequency sub-grids for a plurality of ports to a template time-frequency resource grid template mapping of carriers and a first plurality of time periods; mapping a plurality of resource elements in an OFDM time-frequency resource grid to a plurality of ports based at least in part on the template mapping; and transmitting and receiving reference signals based on the mapping. In some cases, each of the plurality of ports is associated with a corresponding RF chain.

Transmitter 620 may transmit data or control signals or information (ie, transmissions) generated by other components of apparatus 605, some or all of which may be associated with various information channels (eg, data channels, control channels, etc.). In some examples, transmitter 620 may be co-located with receiver 610 in a transceiver. For example, transmitter 620 and receiver 610 may be examples of aspects of transceiver 1130 or 1250 described with reference to FIG. 11 or 12 . Transmitter 620 may include a single antenna or a group of antennas.

7 illustrates a block diagram 700 of an apparatus 705 for wireless communication in accordance with various aspects of the present disclosure. Apparatus 705 may be an example of aspects of the UE or apparatus described with reference to FIGS. 1 , 2 and 6 . Apparatus 705 may include receiver 710 , wireless communication manager 715 and transmitter 720 . Apparatus 705 may also include a processor. Each of these components can communicate with each other (eg, via one or more buses).

Receiver 710 may receive data or control signals or information (ie, transmissions), some or all of which may be associated with various information channels (eg, data channels, control channels, etc.). The received signals or information, or measurements performed on the received signals or information, may be communicated to other components of the apparatus 705 . Receiver 710 may include a single antenna or a group of antennas.

The wireless communication manager 715 may include a template resource element to port mapper 725 , a reference signal reception manager 730 and a reference signal decoder 735 . The wireless communication manager 715 may be an example of aspects of the wireless communication manager included in the UE, as described with reference to FIGS. 1 and 6 .

A template resource element to port mapper 725 may be used to identify template mappings for a plurality of ports to a first plurality of frequency subcarriers and a first plurality of time periods in a grid of template time-frequency resources, as for example with reference to FIGS. 3 and 4 describe. In some examples, each of the plurality of ports may be associated with a corresponding RF chain. The template resource element to port mapper 725 may additionally or alternatively be used to map a plurality of resource elements in an OFDM time-frequency resource grid to a plurality of ports based at least in part on template mapping, as described, for example, with reference to FIGS. 3 and 4 . In some examples, the mapping can include mapping each resource element of the plurality of resource elements to a single port of the plurality of ports based at least in part on template mapping. In some examples, the mapping can include mapping each resource element of the plurality of resource elements to a port group of the plurality of ports based at least in part on the OCC associated with the template mapping, as described with reference to FIG. 5 . In some examples, the number of ports in the port group may be based, at least in part, on the length of the OCC. In some examples, the OFDM time-frequency resource grid may include at least one of: a second plurality of frequency sub-carriers greater in number than the first plurality of frequency sub-carriers, greater in number than the first plurality the second plurality of time periods, or a combination thereof.

Reference signal reception manager 730 may be operable to receive one or more reference signals from the second wireless device on one or more subsets of the plurality of ports based at least in part on the mapping, as described, for example, with reference to FIGS. 3 and 4 . In some examples, each subset of the plurality of resource elements may be distributed in time and frequency on the OFDM time-frequency resource grid.

Reference signal decoder 735 may be operable to decode reference signals from one or more subsets of the plurality of resource elements based at least in part on the mapping, as described, for example, with reference to FIGS. 3 and 4 .

Transmitter 720 may transmit data or control signals or information (ie, transmissions) generated by other components of apparatus 705, some or all of which may be associated with various information channels (eg, data channels, control channels, etc.). In some examples, transmitter 720 may be co-located with receiver 710 in a transceiver. For example, transmitter 720 and receiver 710 may be examples of aspects of transceiver 1130 or 1250 described with reference to FIG. 11 or 12 . Transmitter 720 may include a single antenna or a group of antennas.

8 illustrates a block diagram 800 of a wireless communication manager 815 in accordance with various aspects of the present disclosure. The wireless communication manager 815 may be an example of aspects of the wireless communication manager included in the UE, as described with reference to FIGS. 1 , 6 and 7 . The wireless communication manager 815 may include a template resource element to port mapper 825 , an OCC resource element to port mapper 830 , a reference signal reception manager 835 and a reference signal decoder 840 . Each of these components may communicate with each other directly or indirectly (eg, via one or more buses). The template resource element to port mapper 825, reference signal reception manager 835 and reference signal decoder 840 may be similar to the template resource element to port mapper 725, reference signal reception manager 730 and reference signal decoder 735 described with reference to FIG. 7 is configured and can perform its functions.

The template resource element to port mapper 825 may be used to identify template mappings for a plurality of ports to a first plurality of frequency sub-carriers and a first plurality of time periods in a grid of template time-frequency resources, as for example with reference to FIGS. 3 and 4 describe. In some examples, each of the plurality of ports may be associated with a corresponding RF chain. The template resource element to port mapper 825 may additionally or alternatively be used to map a plurality of resource elements in an OFDM time-frequency resource grid to a plurality of ports based at least in part on template mapping, as described, for example, with reference to FIGS. 3 and 4 . In some examples, the OFDM time-frequency resource grid may include at least one of: a second plurality of frequency sub-carriers greater in number than the first plurality of frequency sub-carriers, greater in number than the first plurality the second plurality of time periods, or a combination thereof.

The OCC resource element to port mapper 830 may be used to apply OCC to at least one resource element group of a plurality of resource elements, as eg described with reference to FIG. 5 . Applying OCC to a resource element group may map each resource element in the resource element group to a port group, where the port group may have been associated with the resource element group by mapping multiple resource elements to multiple ports. In some examples, the number of ports in the port group may be based, at least in part, on the length of the OCC.

The reference signal reception manager 835 may be configured to receive one or more reference signals from the second wireless device on one or more subsets of the plurality of ports based at least in part on the mapping and application of the OCC, as for example with reference to FIG. 3 and 4 as described. In some examples, each subset of the plurality of resource elements may be distributed in time and frequency on the OFDM time-frequency resource grid.

Reference signal decoder 840 may be operable to decode reference signals from one or more subsets of the plurality of resource elements based at least in part on the mapping, as described, for example, with reference to FIGS. 3 and 4 .

9 illustrates a block diagram 900 of an apparatus 905 for wireless communication in accordance with various aspects of the present disclosure. Apparatus 905 may be an example of aspects of the network access device or apparatus described with reference to FIGS. 1 , 2 and 6 . Apparatus 905 may include receiver 910 , wireless communication manager 915 and transmitter 920 . Apparatus 905 may also include a processor. Each of these components can communicate with each other (eg, via one or more buses).

Receiver 910 may receive data or control signals or information (ie, transmissions), some or all of which may be associated with various information channels (eg, data channels, control channels, etc.). The received signals or information, or measurements performed on the received signals or information, may be communicated to other components of the apparatus 905 . Receiver 910 may include a single antenna or a group of antennas.

The wireless communication manager 915 may include a template resource element to port mapper 925 , a reference signal mapper 930 and a reference signal transmission manager 935 . The wireless communication manager 915 may be an example of aspects of a wireless communication manager included in a network access device, as described with reference to FIGS. 1 and 6 .

The template resource element to port mapper 925 may be used to identify template mappings for a plurality of ports to a first plurality of frequency subcarriers and a first plurality of time periods in a grid of template time-frequency resources, as for example with reference to FIGS. 3 and 4 describe. In some examples, each of the plurality of ports may be associated with a corresponding RF chain. The template resource element to port mapper 925 may additionally or alternatively be used to map a plurality of resource elements in an OFDM time-frequency resource grid to a plurality of ports based at least in part on template mapping, as described, for example, with reference to FIGS. 3 and 4 . In some examples, the mapping can include mapping each resource element of the plurality of resource elements to a single port of the plurality of ports based at least in part on template mapping. In some examples, the mapping may include mapping each of the plurality of resource elements to a port group of the plurality of ports based at least in part on the OCC associated with the template mapping, as described, eg, with reference to FIG. 5 . In some examples, the number of ports in the port group may be based, at least in part, on the length of the OCC. In some examples, the OFDM time-frequency resource grid may include at least one of: a second plurality of frequency sub-carriers greater in number than the first plurality of frequency sub-carriers, greater in number than the first plurality the second plurality of time periods, or a combination thereof.

The reference signal mapper 930 may be configured to map one or more reference signals to one or more subsets of the plurality of resource elements based at least in part on the mapping of the plurality of resource elements to the plurality of ports, as eg with reference to FIG. 3 and 4 described. In some examples, each subset of the plurality of resource elements may be distributed in time and frequency on the OFDM time-frequency resource grid.

The reference signal transmission manager 935 may be configured to transfer the mapped reference signals from the plurality of ports to the plurality of ports based at least in part on the mapping of the plurality of resource elements to the plurality of ports and the mapping of the reference signals to the subsets of the plurality of resource elements. The one or more subsets are sent to at least a second wireless device, as described, for example, with reference to FIGS. 3 and 4 .

Transmitter 920 may transmit data or control signals or information (ie, transmissions) generated by other components of apparatus 905, some or all of which may be associated with various information channels (eg, data channels, control channels, etc.). In some examples, transmitter 920 may be co-located with receiver 910 in a transceiver. For example, transmitter 920 and receiver 910 may be examples of aspects of transceiver 1130 or 1250 described with reference to FIG. 11 or 12 . Transmitter 920 may include a single antenna or a group of antennas.

10 illustrates a block diagram 1000 of a wireless communication manager 1015 in accordance with various aspects of the present disclosure. The wireless communication manager 1015 may be an example of aspects of the wireless communication manager included in the UE, as described with reference to FIGS. 1 , 6 and 9 . The wireless communication manager 1015 may include a template resource element to port mapper 1025 , an OCC resource element to port mapper 1030 , a reference signal mapper 1035 and a reference signal transmission manager 1040 . Each of these components may communicate with each other directly or indirectly (eg, via one or more buses). Template resource element to port mapper 1025, reference signal mapper 1035 and reference signal transmission manager 1040 may be similar to template resource element to port mapper 925, reference signal mapper 930 and reference signal transmission manager 935 described with reference to FIG. 9 is configured and can perform its functions.

A template resource element to port mapper 1025 may be used to identify template mappings for a plurality of ports to a first plurality of frequency subcarriers and a first plurality of time periods in a grid of template time-frequency resources, as for example with reference to FIGS. 3 and 4 describe. In some examples, each of the plurality of ports may be associated with a corresponding RF chain. A template resource element to port mapper 1025 may additionally or alternatively be used to map a plurality of resource elements in an OFDM time-frequency resource grid to a plurality of ports based at least in part on template mapping, as described, for example, with reference to FIGS. 3 and 4 . In some examples, the OFDM time-frequency resource grid may include at least one of: a second plurality of frequency sub-carriers greater in number than the first plurality of frequency sub-carriers, greater in number than the first plurality the second plurality of time periods, or a combination thereof.

The OCC resource element to port mapper 1030 may be used to apply OCC to at least one resource element group of a plurality of resource elements, as described, for example, with reference to FIG. 5 . Applying OCC to a resource element group may map each resource element in the resource element group to a port group, where the port group may have been associated with the resource element group by mapping resource elements to ports. In some examples, the number of ports in the port group may be based, at least in part, on the length of the OCC.

The reference signal mapper 1035 can be configured to map one or more reference signals to one or more subsets of the plurality of resource elements based at least in part on the mapping of the plurality of resource elements to the plurality of ports and the application of the OCC, such as For example as described with reference to FIGS. 3 and 4 . In some examples, each subset of the plurality of resource elements may be distributed in time and frequency on the OFDM time-frequency resource grid.

The reference signal transmission manager 1040 can be configured to transfer the mapped reference signals from the plurality of ports to the plurality of ports based at least in part on the mapping of the plurality of resource elements to the plurality of ports and the mapping of the reference signals to the subsets of the plurality of resource elements. The one or more subsets are sent to at least a second wireless device, as described, for example, with reference to FIGS. 3 and 4 .

11 illustrates a block diagram 1100 of a UE 1115 for wireless communication in accordance with various aspects of the present disclosure. UE 1115 may include or be part of the following: personal computers (eg, laptops, netbooks, tablets, etc.), cellular phones, PDAs, digital video recorders (DVRs), Internet appliances, game consoles, e-readers , vehicles, home appliances, lighting or alarm control systems, etc. In some examples, UE 1115 may have an internal power source (not shown), such as a small battery, to facilitate mobile operation. In some examples, UE 1115 may be an example of aspects of one or more of the UEs described with reference to FIGS. 1 and 2 , or aspects of one or more of the apparatuses described with reference to FIGS. 6 , 7 and 9 . Example. UE 1115 may be configured to implement at least some of the UE or device techniques and functions described with reference to Figures 1-10.

UE 1115 may include processor 1110 , memory 1120 , at least one transceiver (represented by transceiver 1130 ), antenna 1140 (eg, an antenna array), or wireless communication manager 1150 . Each of these components may communicate with each other directly or indirectly through one or more buses 1135 .

The memory 1120 may include random access memory (RAM) or read only memory (ROM). The memory 1120 may store computer-readable, computer-executable code 1125 containing instructions that, when executed, are configured to cause the processor 1110 to perform various functions described herein in connection with wireless communications, including, for example, based on port-to-port to Template mapping of frequency subcarriers and time segments, mapping resource elements to ports. Alternatively, the computer-executable code 1125 may not be directly executable by the processor 1110, but rather be configured to cause the UE 1115 (eg, when compiled and executed) to perform the various functions described herein.

The processor 1110 may include intelligent hardware devices such as a central processing unit (CPU), microcontroller, ASIC, and the like. The processor 1110 may process information received through the transceiver 1130 or information to be sent to the transceiver 1130 for transmission through the antenna 1140 . Processor 1110, alone or in combination with wireless communication manager 1150, may handle aspects of communicating over (or managing communication over one or more radio frequency spectrum bands) over one or more radio frequency spectrum bands.

Transceiver 1130 may include a modem configured to modulate packets and provide the modulated packets to antenna 1140 for transmission, and to demodulate packets received from antenna 1140 . In some examples, transceiver 1130 may be implemented as one or more transmitters and one or more separate receivers. Transceiver 1130 may support communications in one or more radio frequency spectrum bands. The transceiver 1130 may be configured to communicate bidirectionally via the antenna 1140 with one or more network access devices or apparatuses, such as one or more of the network access devices described with reference to FIGS. 1 and 2, or with reference to One or more of the devices depicted in FIGS. 6 , 7 and 9 .

The wireless communication manager 1150 may be configured to perform or control some or all of the UE or device techniques or functions described with reference to FIGS. 1-10 related to wireless communication. Wireless communication manager 1150 , or a portion thereof, may include a processor, or some or all of the functions of wireless communication manager 1150 may be performed by or in conjunction with processor 1110 . In some examples, the wireless communication manager 1150 may be an example of the wireless communication manager described with reference to Figures 1 and 6-10.

12 shows a block diagram 1200 of a network access device 1205 for wireless communications in accordance with various aspects of the present disclosure. In some examples, network access device 1205 may be an example of aspects of one or more of the network access devices (eg, radio heads, base stations, gNBs, or ANCs) described with reference to FIGS. 1 and 2 . , or an example of an aspect of one or more of the apparatuses described with reference to FIGS. 6 , 7 and 9 . Network access device 1205 may be configured to implement or facilitate at least some of the network access device techniques and functions described with reference to Figures 1-10.

Network access device 1205 may include processor 1210 , memory 1220 , at least one transceiver (represented by transceiver 1250 ), antenna 1255 (eg, an antenna array), or wireless communication manager 1260 . Network access device 1205 may also include one or more of network access device communicator 1230 or network communicator 1240. Each of these components may communicate with each other directly or indirectly through one or more buses 1235 .

The memory 1220 may include RAM or ROM. The memory 1220 may store computer-readable, computer-executable code 1225 containing instructions that, when executed, are configured to cause the processor 1210 to perform various functions described herein in connection with wireless communications, including, for example, based on port-to-port to Template mapping of frequency subcarriers and time segments, mapping resource elements to ports. Alternatively, the computer-executable code 1225 may not be directly executable by the processor 1210, but rather be configured to cause the network access device 1205 (eg, when compiled and executed) to perform the various functions described herein.

Processor 1210 may include intelligent hardware devices such as CPUs, microcontrollers, ASICs, and the like. Processor 1210 may process information received through transceiver 1250 , network access device communicator 1230 , or network communicator 1240 . Processor 1210 may also process information to be sent to transceiver 1250 for transmission via antenna 1225, or to network access device communicator 1230 for transmission to one or more other network access devices (eg, network access devices). device 1205-a and network access device 1205-b), or information to be sent to the network communicator 1240 for transmission to a core network 1245, which may be one of the core networks 130 described with reference to FIG. or examples of multiple aspects. Processor 1210, alone or in conjunction with wireless communication manager 1260, may handle aspects of communicating over (or managing communications over one or more radio frequency spectrum bands) over one or more radio frequency spectrum bands.

Transceiver 1250 may include a modem configured to modulate packets and provide the modulated packets to antenna 1255 for transmission, and to demodulate packets received from antenna 1255. In some examples, transceiver 1250 may be implemented as one or more transmitters and one or more separate receivers. Transceiver 1250 may support communications in one or more radio frequency spectrum bands. The transceiver 1250 may be configured to communicate bidirectionally via the antenna 1255 with one or more UEs or devices, such as one or more of the UEs described with reference to FIGS. 1 , 2 and 11 , or with reference to FIGS. 6 , 7 and 9 one or more of the devices. Network access device 1205 may communicate with core network 1245 through network communicator 1240 . Network access device 1205 may also use network access device communicator 1230 to communicate with other network access devices, such as network access device 1205-a and network access device 1205-b.

The wireless communication manager 1260 may be configured to perform or control some or all of the network access equipment or apparatus techniques or functions described with reference to FIGS. 1-10 related to wireless communication. Wireless communication manager 1260, or a portion thereof, may include a processor, or some or all of the functions of wireless communication manager 1260 may be performed by or in conjunction with processor 1210. In some examples, the wireless communication manager 1260 may be an example of the wireless communication manager described with reference to FIGS. 1 and 6-10.

13 is a flowchart illustrating an example of a method 1300 for wireless communication at a wireless device (eg, a first wireless device) in accordance with various aspects of the present disclosure. For clarity, aspects of one or more of the UEs described below with reference to Figures 1, 2 and 11, aspects of one or more of the network access devices described with reference to Figures 1, 2 and 12 are Aspects, aspects of one or more of the apparatuses described with reference to FIGS. 6 and 7 , or one or more of the wireless communication managers described with reference to FIGS. 1 , 6 , 7 , 8 , 11 and 12 method 1300 is described in terms of aspects. In some examples, the first wireless device may execute one or more sets of codes to control functional units of the first wireless device to perform the functions described below. Additionally or alternatively, the first wireless device may use dedicated hardware to perform one or more of the functions described below.

At block 1305, the method 1300 can include identifying template mappings for the plurality of ports to the first plurality of frequency subcarriers and the first plurality of time periods in the grid of template time-frequency resources, as described, for example, with reference to FIGS. 3 and 4 of. In some examples, each of the plurality of ports may be associated with a corresponding RF chain. In some examples, the operations at block 1305 may be performed using the template resource element to port mapper described with reference to FIGS. 7 and 8 .

At block 1310 , method 1300 may include mapping a plurality of resource elements in an OFDM time-frequency resource grid to a plurality of ports based at least in part on template mapping, as described, for example, with reference to FIGS. 3 and 4 . In some examples, the mapping may include mapping each resource element of the plurality of resource elements to a single port of the plurality of ports based at least in part on the template mapping. In some examples, the mapping can include mapping each resource element of the plurality of resource elements to a port group of the plurality of ports based at least in part on the OCC associated with the template mapping, as described with reference to FIG. 5 . In some examples, the number of ports in the port group may be based, at least in part, on the length of the OCC. In some examples, the OFDM time-frequency resource grid may include at least one of: a second plurality of frequency sub-carriers greater in number than the first plurality of frequency sub-carriers, greater in number than the first plurality the second plurality of time periods, or a combination thereof. In some examples, the operations at block 1310 may be performed using the template resource element to port mapper described with reference to FIGS. 7 and 8 .

At block 1315 , method 1300 may include receiving reference signals from the second wireless device on a subset of the plurality of ports based at least in part on the mapping, as described, eg, with reference to FIGS. 3 and 4 . In some examples, a subset of the plurality of resource elements may be distributed in time and frequency on the OFDM time-frequency resource grid. In some examples, the operations at block 1315 may be performed using the reference signal reception manager described with reference to FIGS. 7 and 8 .

At block 1320 , method 1300 may include decoding reference signals from a subset of the plurality of resource elements based at least in part on the mapping, as described, eg, with reference to FIGS. 3 and 4 . For example, decoding may include analog combining of signals received at multiple physical antennas associated with the antenna ports to detect signal energy received via the antenna ports. In some examples, the operations at block 1320 may be performed using the reference signal decoder described with reference to FIGS. 7 and 8 .

14 is a flowchart illustrating an example of a method 1400 for wireless communication at a wireless device (eg, a first wireless device) in accordance with one or more aspects of the present disclosure. For clarity, aspects of one or more of the UEs described below with reference to Figures 1, 2 and 11, aspects of one or more of the network access devices described with reference to Figures 1, 2 and 12 are Aspects, aspects of one or more of the apparatuses described with reference to FIGS. 6 and 7 , or one or more of the wireless communication managers described with reference to FIGS. 1 , 6 , 7 , 8 , 11 and 12 method 1400 is described in terms of aspects. In some examples, the first wireless device may execute one or more sets of codes to control functional units of the first wireless device to perform the functions described below. Additionally or alternatively, the first wireless device may use dedicated hardware to perform one or more of the functions described below.

At block 1405, the method 1400 can include identifying template mappings for the plurality of ports to the first plurality of frequency subcarriers and the first plurality of time periods in the template time-frequency resource grid, as described, for example, with reference to FIGS. 3 and 4 of. In some examples, each of the plurality of ports may be associated with a corresponding RF chain. In some examples, the operations at block 1405 may be performed using the template resource element to port mapper described with reference to FIGS. 7 and 8 .

At block 1410 , method 1400 may include mapping a plurality of resource elements in an OFDM time-frequency resource grid to a plurality of ports based at least in part on template mapping, as described, eg, with reference to FIGS. 3 and 4 . In some examples, the mapping can include mapping each resource element of the plurality of resource elements to a single port of the plurality of ports based at least in part on template mapping. In some examples, the mapping may include mapping each resource element of the plurality of resource elements to a port group of the plurality of ports based at least in part on the OCC associated with the template mapping, as described with reference to FIG. 5 . In some examples, the number of ports in the port group may be based, at least in part, on the length of the OCC. In some examples, the OFDM time-frequency resource grid may include at least one of: a second plurality of frequency sub-carriers greater in number than the first plurality of frequency sub-carriers, greater in number than the first plurality the second plurality of time periods of the time period, or a combination thereof. In some examples, the operations at block 1410 may be performed using the template resource element to port mapper described with reference to FIGS. 7 and 8 .

At block 1415 , the method 1400 can include receiving a plurality of reference signals from the second wireless device on the plurality of subsets of the plurality of ports based at least in part on the mapping, as described, eg, with reference to FIGS. 3 and 4 . In some examples, each subset of the plurality of resource elements may be distributed in time and frequency on the OFDM time-frequency resource grid. In some examples, multiple reference signals may be received using receive beam scanning in time and frequency. In some examples, the operations at block 1415 may be performed using the reference signal reception manager described with reference to FIGS. 7 and 8 .

At block 1420 , the method 1400 may include decoding a plurality of reference signals from a plurality of subsets of the plurality of resource elements based at least in part on the mapping, as described, eg, with reference to FIGS. 3 and 4 . In some examples, the operations at block 1420 may be performed using the reference signal decoder described with reference to FIGS. 7 and 8 .

15 is a flowchart illustrating an example of a method 1500 for wireless communication at a wireless device (eg, a first wireless device) in accordance with one or more aspects of the present disclosure. For clarity, aspects of one or more of the UEs described below with reference to Figures 1, 2 and 11, aspects of one or more of the network access devices described with reference to Figures 1, 2 and 12 are Aspects, aspects of one or more of the apparatuses described with reference to Figures 6 and 7, aspects of one or more of the wireless communication managers described with reference to Figures 1, 6, 7, 8, 11 and 12 The method 1500 is described in terms of aspects. In some examples, the first wireless device may execute one or more sets of codes to control functional units of the first wireless device to perform the functions described below. Additionally or alternatively, the first wireless device may use dedicated hardware to perform one or more of the functions described below.

At block 1505, the method 1500 can include identifying template mappings for the plurality of ports to the first plurality of frequency subcarriers and the first plurality of time periods in the grid of template time-frequency resources, as described, for example, with reference to FIGS. 3 and 4 of. In some examples, each of the plurality of ports may be associated with a corresponding RF chain. In some examples, the operations at block 1505 may be performed using the template resource element to port mapper described with reference to FIGS. 7 and 8 .

At block 1510 , method 1500 may include mapping a plurality of resource elements in an OFDM time-frequency resource grid to a plurality of ports based at least in part on template mapping, as described, eg, with reference to FIGS. 3 and 4 . In some examples, the OFDM time-frequency resource grid may include at least one of: a second plurality of frequency sub-carriers greater in number than the first plurality of frequency sub-carriers, greater in number than the first plurality the second plurality of time periods, or a combination thereof. In some examples, the operations at block 1510 may be performed using the template resource element to port mapper described with reference to FIGS. 7 and 8 .

At block 1515 , the method 1500 may include applying the OCC to at least one resource element group of the plurality of resource elements, as described, eg, with reference to FIG. 5 . Applying OCC to a resource element group may map each resource element in the resource element group to a port group, where the port group may have been associated with the resource element group by mapping multiple resource elements to multiple ports. In some examples, the number of ports in the port group may be based, at least in part, on the length of the OCC. In some examples, the operations at block 1515 may be performed using the OCC resource element to port mapper described with reference to FIG. 8 .

At block 1520, the method 1500 can include receiving a reference signal from the second wireless device on a subset of the plurality of ports based at least in part on the mapping and application of the OCC, as described, eg, with reference to FIGS. 3 and 4 . In some examples, a subset of the plurality of resource elements may be distributed in time and frequency on the OFDM time-frequency resource grid. In some examples, the operations at block 1520 may be performed using the reference signal reception manager described with reference to FIGS. 7 and 8 .

At block 1525 , method 1500 may include decoding reference signals from a subset of the plurality of resource elements based at least in part on the mapping, as described, eg, with reference to FIGS. 3 and 4 . In some examples, the operations at block 1525 may be performed using the reference signal decoder described with reference to FIGS. 7 and 8 .

16 is a flowchart illustrating an example of a method 1600 for wireless communication at a wireless device (eg, a first wireless device) in accordance with one or more aspects of the present disclosure. For clarity, aspects of one or more of the UEs described below with reference to Figures 1, 2 and 11, aspects of one or more of the network access devices described with reference to Figures 1, 2 and 12 are Aspects, aspects of one or more of the apparatuses described with reference to FIGS. 6 and 7 , or one or more of the wireless communication managers described with reference to FIGS. 1 , 6 , 7 , 8 , 11 and 12 method 1600 is described in terms of aspects. In some examples, the first wireless device may execute one or more sets of codes to control functional units of the first wireless device to perform the functions described below. Additionally or alternatively, the first wireless device may use dedicated hardware to perform one or more of the functions described below.

At block 1605, the method 1600 can include identifying template mappings for the plurality of ports to the first plurality of frequency subcarriers and the first plurality of time periods in the grid of template time-frequency resources, as described, for example, with reference to FIGS. 3 and 4 of. In some examples, each of the plurality of ports may be associated with a corresponding RF chain. In some examples, the operations at block 1605 may be performed using the template resource element to port mapper described with reference to FIGS. 9 and 10 .

At block 1610 , method 1600 may include mapping a plurality of resource elements in an OFDM time-frequency resource grid to a plurality of ports based at least in part on template mapping, as described, eg, with reference to FIGS. 3 and 4 . In some examples, the mapping of the plurality of resource elements to the plurality of ports may include mapping each resource element of the plurality of resource elements to a single port of the plurality of ports based at least in part on template mapping. In some examples, the mapping of the plurality of resource elements to the plurality of ports may include mapping each of the plurality of resource elements to a port group of the plurality of ports based at least in part on the OCC associated with the template mapping , as described with reference to FIG. 5 . In some examples, the number of ports in the port group may be based, at least in part, on the length of the OCC. In some examples, the OFDM time-frequency resource grid may include at least one of: a second plurality of frequency sub-carriers greater in number than the first plurality of frequency sub-carriers, greater in number than the first plurality the second plurality of time periods, or a combination thereof. In some examples, the operations at block 1610 may be performed using the template resource element to port mapper described with reference to FIGS. 9 and 10 .

At block 1615 , method 1600 may include mapping reference signals to subsets of the plurality of resource elements based at least in part on the mapping of the plurality of resource elements to the plurality of ports, as described, eg, with reference to FIGS. 3 and 4 . In some examples, a subset of the plurality of resource elements may be distributed in time and frequency on the OFDM time-frequency resource grid. In some examples, the operations at block 1615 may be performed using the reference signal mapper described with reference to FIGS. 9 and 10 .

At block 1620, the method 1600 can include, based at least in part on the mapping of the plurality of resource elements to the plurality of ports and the mapping of the reference signals to the subset of the plurality of resource elements, converting the mapped reference signals from the plurality of ports The subset is sent to at least a second wireless device, as described, for example, with reference to FIGS. 3 and 4 . In some examples, the operations at block 1620 may be performed using the reference signal transmission manager described with reference to FIGS. 9 and 10 .

17 is a flowchart illustrating an example of a method 1700 for wireless communication at a wireless device (eg, a first wireless device) in accordance with one or more aspects of the present disclosure. For clarity, aspects of one or more of the UEs described below with reference to Figures 1, 2 and 11, aspects of one or more of the network access devices described with reference to Figures 1, 2 and 12 are Aspects, aspects of one or more of the apparatuses described with reference to FIGS. 6 and 7 , or one or more of the wireless communication managers described with reference to FIGS. 1 , 6 , 7 , 8 , 11 and 12 method 1700 is described in terms of aspects. In some examples, the first wireless device may execute one or more sets of codes to control functional units of the first wireless device to perform the functions described below. Additionally or alternatively, the first wireless device may use dedicated hardware to perform one or more of the functions described below.

At block 1705, the method 1700 can include identifying template mappings for the plurality of ports to the first plurality of frequency subcarriers and the first plurality of time periods in the grid of template time-frequency resources, as described, for example, with reference to FIGS. 3 and 4 of. In some examples, each of the plurality of ports may be associated with a corresponding RF chain. In some examples, the operations at block 1705 may be performed using the template resource element to port mapper described with reference to FIGS. 9 and 10 .

At block 1710 , method 1700 may include mapping a plurality of resource elements in an OFDM time-frequency resource grid to a plurality of ports based at least in part on template mapping, as described, eg, with reference to FIGS. 3 and 4 . In some examples, the mapping of the plurality of resource elements to the plurality of ports may include mapping each resource element of the plurality of resource elements to a single port of the plurality of ports based at least in part on template mapping. In some examples, the mapping of the plurality of resource elements to the plurality of ports may include mapping each of the plurality of resource elements to a port group of the plurality of ports based at least in part on the OCC associated with the template mapping , as described with reference to FIG. 5 . In some examples, the number of ports in the port group may be based, at least in part, on the length of the OCC. In some examples, the OFDM time-frequency resource grid may include at least one of: a second plurality of frequency sub-carriers greater in number than the first plurality of frequency sub-carriers, greater in number than the first plurality the second plurality of time periods, or a combination thereof. In some examples, the operations at block 1710 may be performed using the template resource element to port mapper described with reference to FIGS. 9 and 10 .

At block 1715, the method 1700 can include mapping the plurality of reference signals to the plurality of subsets of the plurality of resource elements based at least in part on the mapping of the plurality of resource elements to the plurality of ports, as described, for example, with reference to FIGS. 3 and 4 of. In some examples, each subset of the plurality of resource elements may be distributed in time and frequency on the OFDM time-frequency resource grid. In some examples, the operations at block 1715 may be performed using the reference signal mapper described with reference to FIGS. 9 and 10 .

At block 1720, the method 1700 can include converting the mapped plurality of reference signals from the plurality of The plurality of subsets of ports are transmitted to at least a second wireless device, as described, for example, with reference to FIGS. 3 and 4 . In some examples, the mapped multiple reference signals may be transmitted using transmit beam scanning in time and frequency. In some examples, the operations at block 1720 may be performed using the reference signal transmission manager described with reference to FIGS. 9 and 10 .

18 is a flowchart illustrating an example of a method 1800 for wireless communication at a wireless device (eg, a first wireless device) in accordance with one or more aspects of the present disclosure. For clarity, aspects of one or more of the UEs described below with reference to Figures 1, 2 and 11, aspects of one or more of the network access devices described with reference to Figures 1, 2 and 12 are Aspects, aspects of one or more of the apparatuses described with reference to FIGS. 6 and 7 , or one or more of the wireless communication managers described with reference to FIGS. 1 , 6 , 7 , 8 , 11 and 12 method 1800 is described in terms of aspects. In some examples, the first wireless device may execute one or more sets of codes to control functional units of the first wireless device to perform the functions described below. Additionally or alternatively, the first wireless device may use dedicated hardware to perform one or more of the functions described below.

At block 1805, the method 1800 can include identifying template mappings for the plurality of ports to the first plurality of frequency subcarriers and the first plurality of time periods in the grid of template time-frequency resources, as described, for example, with reference to FIGS. 3 and 4 of. In some examples, each of the plurality of ports may be associated with a corresponding RF chain. In some examples, the operations at block 1805 may be performed using the template resource element to port mapper described with reference to FIGS. 9 and 10 .

At block 1810 , method 1800 may include mapping a plurality of resource elements in an OFDM time-frequency resource grid to a plurality of ports based at least in part on template mapping, as described, eg, with reference to FIGS. 3 and 4 . In some examples, the OFDM time-frequency resource grid may include at least one of: a second plurality of frequency sub-carriers greater in number than the first plurality of frequency sub-carriers, greater in number than the first plurality the second plurality of time periods, or a combination thereof. In some examples, the operations at block 1810 may be performed using the template resource element to port mapper described with reference to FIGS. 9 and 10 .

At block 1815 , the method 1800 may include applying the OCC to at least one resource element group of the plurality of resource elements, as described, eg, with reference to FIG. 5 . Applying OCC to a resource element group may map each resource element in the resource element group to a port group, where the port group may have been associated with the resource element group by mapping resource elements to ports. In some examples, the number of ports in the port group may be based, at least in part, on the length of the OCC. In some examples, the operations at block 1815 may be performed using the OCC resource element to port mapper described with reference to FIG. 10 .

At block 1820, the method 1800 can include mapping the reference signal to a subset of the plurality of resource elements based at least in part on the mapping of the plurality of resource elements to the plurality of ports and the application of the OCC, as eg with reference to FIGS. 3-5 described. In some examples, a subset of the plurality of resource elements may be distributed in time and frequency on the OFDM time-frequency resource grid. In some examples, the operations at block 1820 may be performed using the reference signal mapper described with reference to FIGS. 9 and 10 .

At block 1825, the method 1800 can include, based at least in part on the mapping of the plurality of resource elements to the plurality of ports and the mapping of the reference signals to the subset of the plurality of resource elements, converting the mapped reference signals from the plurality of ports The subset is sent to at least a second wireless device, as described, for example, with reference to FIGS. 3 and 4 . In some examples, the operations at block 1825 may be performed using the reference signal transmission manager described with reference to FIGS. 9 and 10 .

The methods 1300, 1400, 1500, 1600, 1700, and 1800 described with reference to Figures 13-18 may provide wireless communication. It should be noted that the methods described in FIGS. 13-18 are example implementations of some of the techniques described in this disclosure, and that the operations of the methods may be rearranged, combined with other operations of the same or different methods, or otherwise modified such that Other implementations are possible. Actions can also be added to methods.

The techniques described herein may be used in various wireless communication systems, such as CDMA, TDMA, FDMA, OFDMA, SC-FDMA, and others. The terms "system" and "network" are often used interchangeably. A CDMA system may implement a radio technology such as CDMA2000, Universal Terrestrial Radio Access (UTRA), and the like. CDMA2000 covers IS-2000, IS-95 and IS-856 standards. IS-2000 Releases 0 and A may be referred to as CDMA2000 1X, 1X, and so on. IS-856 (TIA-856) may be referred to as CDMA20001xEV-DO, High Speed Packet Data (HRPD), or the like. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. A TDMA system may implement a wireless technology such as Global System for Mobile Communications (GSM). OFDMA systems may implement wireless technologies such as Ultra Mobile Broadband (UMB), Evolved UTRA (E-UTRA), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMTM, and the like. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). 3GPP LTE and LTE-A are new releases of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in documents from an organization named 3GPP. CDMA2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). The techniques described herein may be used for the systems and wireless technologies described above, as well as other systems and wireless technologies, including cellular (eg, LTE) communications over unlicensed or shared bandwidth. However, the above description describes an LTE/LTE-A system for purposes of example, and LTE terminology is used in much of the above description, but the techniques apply beyond LTE/LTE-A applications.

The detailed description set forth above in connection with the accompanying drawings describes examples and does not represent all examples that may be practiced or within the scope of the claims. When used in this specification, the terms "example" and "exemplary" mean "serving as an example, instance, or illustration" rather than "preferred" or "preferable to other examples." The detailed description includes specific details for the purpose of providing an understanding of the described technology. However, these techniques may be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form in order to avoid obscuring the concepts of the described examples.

Information and signals may be represented using any of a variety of different technologies and approaches. For example, the data, instructions, commands, information, signals, bits, symbols and chips referred to throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic or magnetic particles, light fields or optical particles, or any combination thereof .

The various illustrative blocks and components described in connection with this disclosure may be implemented in general-purpose processors, DSPs, ASICs, FPGAs or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or designed to perform the functions described herein. any combination thereof to implement or perform. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in combination with a DSP core, or any other such configuration.

The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored or transmitted as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the present disclosure and appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwiring, or a combination of any of these. Features implementing functionality may be physically located in various locations, including distributed such that portions of functionality are implemented in different physical locations. As used herein, including in the claims, the term "and/or" when used in a list of two or more items means that any of the listed items can be used alone, or Any combination of two or more of the items listed can be used. For example, if a composition is described as containing components A, B, and/or C, the composition may contain A alone; B alone; C alone; A and B in combination; A and C in combination; B and C a combination of ; or a combination of A, B, and C. Also, as used herein, including in the claims, the use of "or" in a list of items (eg, a list of items ending with a phrase such as "at least one" or "one or more") indicates an inclusive list, Such that, for example, a phrase referring to "at least one of" a list of items refers to any combination of those items, including individual members. For example, "at least one of A, B, or C" is intended to encompass A, B, C, A-B, A-C, B-C, and A-B-C, as well as any combination with multiples of the same elements (eg, A-A, A-A-A, A-A-B, A-A-C, A-B-B, A-C-C, B-B, B-B-B, B-B-C, C-C and C-C-C or any other ordering of A, B and C). As used herein, the phrase "based on" should not be interpreted as a reference to a closed set of conditions. For example, an exemplary operation described as "based on condition A" may be based on condition A and condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase "based on" is to be construed in the same manner as the phrase "based at least in part on."

Computer-readable media includes both non-volatile computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. Non-volatile storage media can be any available media that can be accessed by a general purpose or special purpose computer. By way of example and not limitation, non-volatile computer-readable media may include RAM, ROM, electrically erasable programmable read only memory (EEPROM), compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic A storage device or any other non-volatile medium that can be used to carry or store required program code modules in the form of instructions or data structures and that can be accessed by a general purpose or special purpose computer or a general purpose or special purpose processor. Also, any connection is properly termed a computer-readable medium. For example, if coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave are used to transmit software from a website, server, or other remote source, coaxial cable, fiber optic cable, Twisted pair, DSL or wireless technologies such as infrared, radio and microwave are included in the definition of medium. Disk and disc, as used herein, includes CD, laser disc, optical disc, digital versatile disc (DVD), floppy disk, and blu-ray disc, where disks typically reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above are also included within the scope of computer-readable media.

The preceding description of the present disclosure is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to the present disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other modifications without departing from the scope of the present disclosure. Thus, the present disclosure is not to be limited to the examples and designs described herein, but is to be accorded the widest scope consistent with the principles and novel techniques disclosed herein.

Claims (30)

1. a kind of method of the wireless communication of first wireless devices, comprising:

It identifies to a frequency sub-carrier more than multiple ports to first in template running time-frequency resource grid and more than first a periods Template Map, wherein each port in the multiple port is associated with corresponding radio frequency (RF) chain；

It is based at least partially on the Template Map, by multiple resource elements in orthogonal frequency division multiplexing (OFDM) running time-frequency resource grid Element is mapped to the multiple port；

It is based at least partially on the mapping, receives reference signal from the second wireless device in the subset of the multiple port； And

It is based at least partially on the mapping, decodes the reference signal of the subset from the multiple resource element.

2. according to the method described in claim 1, further include:

It is based at least partially on the mapping, receives and wraps from second wireless device in multiple subsets of the multiple port Include multiple reference signals of the reference signal.

3. according to the method described in claim 2, wherein, the multiple reference signal is using the received wave on time and frequency Beam scanning is come received.

4. according to the method described in claim 3, wherein, the subset of the multiple resource element is temporally to divide with frequency Cloth is in the OFDM running time-frequency resource grid.

5. according to the method described in claim 4, wherein, the mapping includes:

It is based at least partially on the Template Map, each resource element in the multiple resource element is mapped to described more Single port in a port.

6. according to the method described in claim 4, wherein, the mapping includes:

Orthogonal covering codes (OCC) associated with the Template Map are based at least partially on, it will be in the multiple resource element Each resource element be mapped to the port set in the multiple port.

7. according to the method described in claim 6, wherein, the port number in the port set is at least partially based on described The length of OCC.

8. according to the method described in claim 1, further include:

Orthogonal covering codes (OCC) is applied at least one resource element groups in the multiple resource element, the OCC is answered Each resource element in the resource element groups is mapped to port set for resource element groups, wherein the port set is By the mapping to the multiple resource element to the multiple port come associated with the resource element groups.

9. according to the method described in claim 1, wherein, the OFDM running time-frequency resource grid includes at least one in the following terms : quantitatively greater than more than second a frequency sub-carriers of more than described first a frequency sub-carriers, be quantitatively greater than described the A period more than the second of a period more than one, or combinations thereof.

10. a kind of device of the wireless communication for the first wireless devices, comprising:

For identification to a frequency sub-carrier and more than first a times more than multiple ports to first in template running time-frequency resource grid The unit of the Template Map of section, wherein each port in the multiple port is associated with corresponding radio frequency (RF) chain；

For being based at least partially on the Template Map, by multiple moneys in orthogonal frequency division multiplexing (OFDM) running time-frequency resource grid Source element is mapped to the unit of the multiple port；

For being based at least partially on the mapping, received from the second wireless device with reference to letter in the subset of the multiple port Number unit；And

For being based at least partially on the mapping, the reference signal of the subset from the multiple resource element is decoded Unit.

11. device according to claim 10, further includes:

For being based at least partially on the mapping, connect in multiple subsets of the multiple port from second wireless device Packet receiving includes the unit of multiple reference signals of the reference signal.

12. device according to claim 11, wherein the multiple reference signal is using the reception on time and frequency Beam scanning comes received.

13. device according to claim 12, wherein the subset of the multiple resource element is temporally and frequency It is distributed in the OFDM running time-frequency resource grid.

14. device according to claim 13, wherein it is described for mapping unit include:

For being based at least partially on the Template Map, each resource element in the multiple resource element is mapped to institute State the unit of the single port in multiple ports.

15. device according to claim 13, wherein it is described for mapping unit include:

For being based at least partially on orthogonal covering codes (OCC) associated with the Template Map, by the multiple resource element Each resource element in element is mapped to the unit of the port set in the multiple port.

16. a kind of wireless communications method of first wireless devices, comprising:

It identifies to a frequency sub-carrier more than multiple ports to first in template running time-frequency resource grid and more than first a periods Template Map, wherein each port in the multiple port is associated with corresponding radio frequency (RF) chain；

It is based at least partially on the Template Map, by multiple resource elements in orthogonal frequency division multiplexing (OFDM) running time-frequency resource grid Element is mapped to the multiple port；

It is based at least partially on the mapping to the multiple resource element to the multiple port, reference signal is mapped to The subset of the multiple resource element；And

It is based at least partially on the mapping to the multiple resource element to the multiple port and the reference is believed Number to the multiple resource element the subset the mapping, by mapped reference signal from the son of the multiple port Collection is sent at least the second wireless device.

17. according to the method for claim 16, further includes:

It is based at least partially on the mapping to the multiple resource element to the multiple port, will include described with reference to letter Number multiple reference signals be mapped to multiple subsets of the multiple resource element.

18. according to the method for claim 17, further includes:

It is based at least partially on the mapping to the multiple resource element to the multiple port and the reference is believed Number to the multiple resource element the subset the mapping, by the multiple reference signals of mapped from the multiple port Multiple subsets be sent at least the second wireless device.

19. according to the method for claim 18, wherein the multiple reference signals of mapped are using on time and frequency Beam scanning is sent to send.

20. according to the method for claim 19, wherein the subset of the multiple resource element is temporally and frequency It is distributed in the OFDM running time-frequency resource grid.

21. according to the method for claim 20, wherein reflected to described in the multiple resource element to the multiple port It penetrates and includes:

It is based at least partially on the Template Map, each resource element in the multiple resource element is mapped to described more Single port in a port.

22. according to the method for claim 20, wherein reflected to described in the multiple resource element to the multiple port It penetrates and includes:

Orthogonal covering codes (OCC) associated with the Template Map are based at least partially on, it will be in the multiple resource element Each resource element be mapped to the port set in the multiple port.

23. according to the method for claim 22, wherein the port number in the port set is at least partially based on institute State the length of OCC.

24. according to the method for claim 16, further includes:

Orthogonal covering codes (OCC) is applied at least one resource element groups in the multiple resource element, the OCC is answered Each resource element in the resource element groups is mapped to port set for resource element groups, wherein the port set is By the mapping to the multiple resource element to the multiple port come associated with the resource element groups.

25. according to the method for claim 16, wherein the OFDM running time-frequency resource grid include in the following terms at least One: being quantitatively greater than greater than more than second a frequency sub-carriers of more than described first a frequency sub-carriers, quantitatively described A period more than the second of a period more than first, or combinations thereof.

26. a kind of device of the wireless communication for the first wireless devices, comprising:

For identification to a frequency sub-carrier and more than first a times more than multiple ports to first in template running time-frequency resource grid The unit of the Template Map of section, wherein each port in the multiple port is associated with corresponding radio frequency (RF) chain；

For being based at least partially on the Template Map, by multiple moneys in orthogonal frequency division multiplexing (OFDM) running time-frequency resource grid Source element is mapped to the unit of the multiple port；

For being based at least partially on the mapping to the multiple resource element to the multiple port, reference signal is reflected It is mapped to the unit of the subset of the multiple resource element；And

For being based at least partially on to the mapping of the multiple resource element to the multiple port and to the ginseng Examine signal to the multiple resource element the subset the mapping, by mapped reference signal from the multiple port Subset be sent to the unit of at least the second wireless device.

27. device according to claim 26, further includes:

It will include the ginseng for being based at least partially on the mapping to the multiple resource element to the multiple port Examine signal multiple reference signals be mapped to the multiple resource element multiple subsets unit.

28. device according to claim 27, further includes:

For being based at least partially on to the mapping of the multiple resource element to the multiple port and to the ginseng Examine signal to the multiple resource element the subset the mapping, by the multiple reference signals of mapped from the multiple Multiple subsets of port are sent to the unit of at least the second wireless device.

29. device according to claim 28, wherein the multiple reference signals of mapped are using on time and frequency Beam scanning is sent to send.

30. device according to claim 26, wherein the subset of the multiple resource element is temporally and frequency It is distributed in the OFDM running time-frequency resource grid.